over ] the 300c john varvatos limited edition. now lease the 2013 chrysler 300 for $299 a month for well-qualified lessees. ♪ by the armful? by the barrelful? the carful? how about...by the bowlful? campbell's soups give you nutrition, energy, and can help you keep a healthy weight. campbell's. it's amazing what soup can do. >>> we are back with living proof of what appears to be an incredible coincidence. one elementary school where an unusual number of kids come in pairs. so why this one school in this one town in tennessee? kiran chetry went there for us looking for answers. >> i'm hane. >> i'm lane. >> i'm bobby. >> i'm johnny. >> i'm tyler. >> timmy. >> i'm laura. >> i'm eddie. >> kiley. >> abby. >> reed. >> sawyer. >> samantha. >> ashley. >> autumn. >> harris. >> emma. >> jack. >> tina. >> lacy. >> mandy. >> reporter: welcome to castle heights elementary school in lebanon, tennessee. home to 611 students and 15 sets of twins. >> this morning we have a set of our third grade twins going to say our pledges. >> i pledge of allegiance to the flag -- >> what's going on? what'